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  <section id="cmake-system-ignore-prefix-path">
<span id="variable:CMAKE_SYSTEM_IGNORE_PREFIX_PATH"></span><h1>CMAKE_SYSTEM_IGNORE_PREFIX_PATH<a class="headerlink" href="#cmake-system-ignore-prefix-path" title="Link to this heading">¶</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.23.</span></p>
</div>
<p><a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">Semicolon-separated list</span></a> of search <em>prefixes</em>
to be ignored by the <span class="target" id="index-0-command:find_program"></span><a class="reference internal" href="../command/find_program.html#command:find_program" title="find_program"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_program()</span></code></a>, <span class="target" id="index-0-command:find_library"></span><a class="reference internal" href="../command/find_library.html#command:find_library" title="find_library"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_library()</span></code></a>,
<span class="target" id="index-0-command:find_file"></span><a class="reference internal" href="../command/find_file.html#command:find_file" title="find_file"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_file()</span></code></a>, and <span class="target" id="index-0-command:find_path"></span><a class="reference internal" href="../command/find_path.html#command:find_path" title="find_path"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_path()</span></code></a> commands.
The prefixes are also ignored by the <em>Config mode</em> of the
<span class="target" id="index-0-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a> command (<em>Module mode</em> is unaffected).
To ignore specific directories instead, see <span class="target" id="index-1-variable:CMAKE_SYSTEM_IGNORE_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_IGNORE_PATH.html#variable:CMAKE_SYSTEM_IGNORE_PATH" title="CMAKE_SYSTEM_IGNORE_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_IGNORE_PATH</span></code></a>.</p>
<p>Ignoring search locations can be useful in cross-compiling environments where
some system directories contain incompatible but possibly linkable libraries.
For example, on cross-compiled cluster environments, this allows a user to
ignore directories containing libraries meant for the front-end machine.</p>
<p><code class="docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_IGNORE_PREFIX_PATH</span></code> is populated by CMake as part of its platform
and toolchain setup. Its purpose is to ignore locations containing
incompatible binaries meant for the host rather than the target platform.
The project or end user should not modify this variable, they should use
<span class="target" id="index-1-variable:CMAKE_IGNORE_PREFIX_PATH"></span><a class="reference internal" href="CMAKE_IGNORE_PREFIX_PATH.html#variable:CMAKE_IGNORE_PREFIX_PATH" title="CMAKE_IGNORE_PREFIX_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_IGNORE_PREFIX_PATH</span></code></a> instead.</p>
<p>See also the following variables:</p>
<ul class="simple">
<li><p><span class="target" id="index-2-variable:CMAKE_SYSTEM_IGNORE_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_IGNORE_PATH.html#variable:CMAKE_SYSTEM_IGNORE_PATH" title="CMAKE_SYSTEM_IGNORE_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_IGNORE_PATH</span></code></a></p></li>
<li><p><span class="target" id="index-0-variable:CMAKE_SYSTEM_PREFIX_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_PREFIX_PATH.html#variable:CMAKE_SYSTEM_PREFIX_PATH" title="CMAKE_SYSTEM_PREFIX_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_PREFIX_PATH</span></code></a></p></li>
<li><p><span class="target" id="index-0-variable:CMAKE_SYSTEM_LIBRARY_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_LIBRARY_PATH.html#variable:CMAKE_SYSTEM_LIBRARY_PATH" title="CMAKE_SYSTEM_LIBRARY_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_LIBRARY_PATH</span></code></a></p></li>
<li><p><span class="target" id="index-0-variable:CMAKE_SYSTEM_INCLUDE_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_INCLUDE_PATH.html#variable:CMAKE_SYSTEM_INCLUDE_PATH" title="CMAKE_SYSTEM_INCLUDE_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_INCLUDE_PATH</span></code></a></p></li>
<li><p><span class="target" id="index-0-variable:CMAKE_SYSTEM_PROGRAM_PATH"></span><a class="reference internal" href="CMAKE_SYSTEM_PROGRAM_PATH.html#variable:CMAKE_SYSTEM_PROGRAM_PATH" title="CMAKE_SYSTEM_PROGRAM_PATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_SYSTEM_PROGRAM_PATH</span></code></a></p></li>
</ul>
</section>


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